// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//

#include <nebula/types/meta/null_type.h>

namespace nebula {

    // ----------------------------------------------------------------------
    // Null type
    constexpr Type::type NullType::type_id;

    std::string NullType::to_string(bool show_metadata) const { return name(); }

    std::string NullType::compute_fingerprint() const { return ::nebula::type_id_fingerprint(*this); }

    const std::shared_ptr<DataType> &null() {
        static std::shared_ptr<DataType> result = std::make_shared<NullType>();
        return result;
    }


} // namespace nebula
